Which of the following escape sequences represents the tab character in C++?

#include<stdio.h>

int main()

{

printf("Hello");

printf("\nWorld");

}

What constant defined in the <climits> header returns the number of bits in a char?

What is true about "this" keyword ?

Which of the following concepts provides facility of using object of one class inside another class?

What is the output of the following C code?

#include<stdio.h>

int main()

{

char ar[] = {1, 2, 3};

char *p = ar;

printf(" %zu ", sizeof(p));

printf(" %zu ", sizeof(ar));

return 0;

}

Which of the following statements is correct?

1. A reference is not a constant pointer.
2. A referenced is automatically de-referenced.

What will be the output?

#include <stdio.h>

int main()

{

   char *_ptr = malloc(100);

   if(_ptr!=NULL)

   free(_ptr);

  _ptr=NULL;

   free(_ptr);

   return 0;

}

Which of the following statement is correct?